P0719

DTC P0719 (3.8L)





Circuit Description
The torque converter clutch (TCC) brake switch indicates brake pedal status to the transmission control module (TCM). The TCC brake switch indicates that the brake pedal is either applied or released. The normally-closed switch supplies battery voltage to the TCM. Applying the brake pedal opens the TCC brake switch, interrupting voltage to the TCM. When the TCM receives 0 volts at the TCC brake switch input, the TCM turns OFF the torque converter clutch pulse width modulation (TCC PWM) solenoid valve.

If the TCM detects an open brake switch, indicating pedal applied during a number of accelerations, then DTC P0719 sets. DTC P0719 is a type C DTC.

DTC Descriptor
This diagnostic procedure supports this DTC:
DTC P0719 Brake Switch Circuit Low Voltage

Conditions for Running the DTC
^ DTC P0719 has not passed this ignition cycle.
^ No VSS DTC P0722 or P0723.

Conditions for Setting the DTC
The TCC brake switch indicates continuously OPEN (0 volts) for more than 15 minutes and these conditions occur 8 times consecutively.
1. The vehicle speed is less than 13 km/h (8 mph).
2. The vehicle speed is between 13 - 52 km/h (8 - 32 mph) for 3 seconds.
3. The vehicle speed remains above 52 km/h (32 mph) for 6 seconds.

Action Taken When the DTC Sets
^ The TCM does not illuminate the malfunction indicator lamp (MIL).
^ The TCM disregards the TCC brake switch for TCC scheduling when all of these conditions are met:
- The TP angle is greater than 6 percent.
- The vehicle speed is greater than 59 km/h (37 mph).
- The TP angle was previously greater than 12 percent while the vehicle speed was greater than 67 km/h (42 mph).
- The TCC brake switch has not indicated OFF for more than 2 seconds this trip.

^ The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as Failure Records.
^ The TCM stores DTC P0719 in PCM history.

Conditions for Clearing the DTC
^ A scan tool can clear the DTC.
^ The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without a non-emission related diagnostic fault occurring.
^ The TCM cancels the DTC default actions when the fault no longer exists and the DTC passes.








Test Description
This number refers to the step number on the diagnostic table.
5. This step isolates the fault between the TCC brake switch and the harness.